Comparative study of adaptive filter channel estimation technique in MIMO-OFDM system based on STBC

2014 ◽  
Author(s):  
Mei Li ◽  
Xiang Wang ◽  
Kun Zhang
Keyword(s):  
Channel Estimation ◽  
Comparative Study ◽  
Adaptive Filter ◽  
Estimation Technique ◽  
Ofdm System ◽  
Mimo Ofdm ◽  
Filter Channel

Performance Analysis of Adaptive Filter Channel Estimated MIMO OFDM Communication System

2018 ◽  
Vol 8 (5) ◽  
pp. 3829
Author(s):  
Srinu Pyla ◽  
K Padma Raju ◽  
N Bala Subrahmanyam
Keyword(s):  
Channel Estimation ◽  
Adaptive Filter ◽  
Channel Coding ◽  
Space Time ◽  
Ofdm System ◽  
Digital Modulation ◽  
Space Time Coding ◽  
Mimo Ofdm ◽  
Time Coding ◽  
Filter Channel

Advanced Communication Systems are wideband systems to support multiple applications such as audio, video and data so and so forth. These systems require high spectral efficiency and data rates. In addition, they should provide multipath fading and inter-symbol interference (ISI) free transmission. Multiple input multiple output orthogonal frequency division multiplexing (MIMO OFDM) meets these requirements Hence, MIMO-OFDM is the most preferable technique for long term evaluation advanced (LTE-A). The primary objective of this paper is to control bit error rate (BER) by proper channel coding, pilot carriers, adaptive filter channel estimation schemes and space time coding (STC). A combination of any of these schemes results in better BER performance over individual schemes. System performance is analyzed for various digital modulation schemes. In this paper,adaptive filter channel estimated MIMO OFDM system is proposed by integrating channel coding, adaptivefilter channel estimation, digital modulation and space time coding. From the simulation results, channel estimated 2×2 MIMO OFDM system shows superior performance over individual schemes.

scholarly journals Performance Analysis of Adaptive Filter Channel Estimated MIMO OFDM Communication System

2018 ◽  
Vol 8 (5) ◽  
pp. 3829
Author(s):  
Srinu Pyla ◽  
K Padma Raju ◽  
N Bala Subrahmanyam
Keyword(s):  
Channel Estimation ◽  
Adaptive Filter ◽  
Channel Coding ◽  
Space Time ◽  
Ofdm System ◽  
Digital Modulation ◽  
Space Time Coding ◽  
Mimo Ofdm ◽  
Time Coding ◽  
Filter Channel

Advanced Communication Systems are wideband systems to support multiple applications such as audio, video and data so and so forth. These systems require high spectral efficiency and data rates. In addition, they should provide multipath fading and inter-symbol interference (ISI) free transmission. Multiple input multiple output orthogonal frequency division multiplexing (MIMO OFDM) meets these requirements Hence, MIMO-OFDM is the most preferable technique for long term evaluation advanced (LTE-A). The primary objective of this paper is to control bit error rate (BER) by proper channel coding, pilot carriers, adaptive filter channel estimation schemes and space time coding (STC). A combination of any of these schemes results in better BER performance over individual schemes. System performance is analyzed for various digital modulation schemes. In this paper,adaptive filter channel estimated MIMO OFDM system is proposed by integrating channel coding, adaptivefilter channel estimation, digital modulation and space time coding. From the simulation results, channel estimated 2×2 MIMO OFDM system shows superior performance over individual schemes.

scholarly journals Performance of Channel Estimation Technique in MIMO-OFDM System Using mPSK Modulation

2013 ◽  
Vol 1 (1) ◽  
Author(s):  
Musayyanah . ◽  
Yoedy Moegiharto ◽  
I Gede Puja Astawa
Keyword(s):  
Channel Estimation ◽  
System Performance ◽  
Orthogonal Frequency Division Multiplexing ◽  
Minimum Mean Square Error ◽  
Estimation Technique ◽  
Ofdm System ◽  
Rate Transmission ◽  
Mimo Ofdm ◽  
Ls Estimator ◽  
Pilot Channel

Multicarrier modulation technique as Orthogonal Frequency Division Multiplexing (OFDM) is able to vanishIntersymbol Interferences (ISI) caused by multipathchannel. Merging with multi- antenna transmission techniques such asMIMO become MIMO- OFDM system is able to improve (data rate transmission)the transmission of data and capacity of the system. Pilot channel estimation technique with the algorithm Linear Minimum Mean Square Error (LMMSE) with modulation m-PSK is applied in this study. The results obtained in the form of graphs BER against EbNo which shows that the system performance with LMMSEestimator has a different gain for QPSKmodulation better about 0.75 dB, for 8 PSKmodulation is about 1.5 dB and for 16 PSKmodulation around 1 dB compare to LS estimator. Number of the largest antenna both in the transmitter and receiver produce the best system performance. Observation for QPSKmodulation shows a scheme transmitter- receiver antenna 4x2 having gain approximately 9 dB better than the number of the lowest transmitter antenna(1x2). For scheme 4x4 shows gain around 8,5 dB than the number of the lowest receiver antenna.Keywords:MIMO, OFDM,LS, LMMSE, MPSK.

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